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Old 05-30-2007, 08:48 AM   #1
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1.6 mm would be 0.063 inches. I wonder if those plug gappers can measure it..it's been awhile since I used one. Otherwise I have to use a micrometer or vernier calipers. I guess I would measure from the tip of the vertical prong to the white porcelain thing. I am more used to measuring on a conventional single prong plug.
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Old 05-30-2007, 09:10 AM   #2
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According to my service manual Boxsters MY 1997 - 2004 all get a spark plug gap of 1.66mm + 0.05mm for all plug brands.
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Old 07-29-2007, 12:56 PM   #3
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So the Beru spark plugs come pre-gapped to 1.66mm?
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Old 07-29-2007, 02:04 PM   #4
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If people are using the Bently manual then there are errors.

The 1997-1999 2.5 uses a 2 side electrode plug. The gap is .8 mm.

The 2000 -2004 2.7/3.2 uses a 4 side electrode plug. The gap is 1.6 mm.

You can see both styles of plugs in the picture.
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Old 07-29-2007, 02:51 PM   #5
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Old 07-29-2007, 03:30 PM   #6
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Almost.

You can check the gap on the 2 side electrode plug. The factory shop manual says .8 mm. Bentley says 1.6 mm but that is for the 4 electrode plug.

No clue how you would measure/check the gap on a 4 side electrode plug. That style plug is said to be pre-gapped from the factory.

Too many plug threads going on at the same time.
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Old 08-09-2008, 11:05 AM   #7
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The question about berol plugs from Porsche coming pre-gapped was never answered on this thread. This afternoon, I'm changing my plugs and the berol ones (2 sided) for my 97 look ungapped.

Anyone know for sure if they're pregapped or not?
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